THE TIMING OF MENTALLY REPRESENTED ACTIONS
THE TIMING OF MENTALLY REPRESENTED ACTIONS
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DOI：
10.1016/s0166-4328(89)80088-9
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发表时间：
1989-08-01
影响因子：
2.7
通讯作者：
PRABLANC, C
中科院分区：
文献类型：
--
作者：
DECETY, J;JEANNEROD, M;PRABLANC, C
在2个实验中，研究了受试者盲目行走到先前检查过的视觉目标（位于距离受试者5、10或15米处）的表现。在Expt. 1、被试被选为良好的视觉表象者，被要求建立目标的心理表征。然后，他们要么实际步行，要么想象自己走向目标。步行时间测量在实际和心理性能。结果发现，受试者在两种情况下花费的时间几乎完全相同。这些受试者的准确性也在实际行走任务中进行了测量。他们被发现没有方向错误，并稍微超过目标位置。来自另一个对照组的受试者，他们没有收到关于视觉图像的指示，犯了更大的错误。在Expt.实验2中，在相同的受试者中测量实际和心理步行时间。1，而他们的肩膀上扛着25公斤的重量。在这种情况下，实际行走时间与实验中相同。1，尽管精神行走时间被发现系统地增加了约30%。这些结果进行了讨论的神经参数编码的电机程序实际执行或精神上执行的行动。
The performance of subjects walking blindly to previously inspected visual targets (located at 5, 10 or 15 m from the subjects) was studied in 2 experiments. In Expt. 1, subjects selected as good visual imagers were instructed to build up a mental representation of the target. Then they had to either actually walk or imagine themselves walking to the target. Walking time was measured in both the actual and the mental performance. It was found that subjects took almost exactly the same time in the two conditions. Accuracy of these subjects was also measured in the actual walking task. They were found to make no direction errors and to slightly overshoot target location. Subjects from another, control, group, who received no instructions about visual imagery made much larger errors. In Expt. 2, actual and mental walking times were measured in the same subjects as in Expt. 1, while they carried a 25-kg weight on their shoulders. In this condition, actual walking time was the same as in Expt. 1, although mental walking time was found to increase systematically by about 30%. These results are discussed in terms of the neural parameters encoded in the motor program for actually executing or mentally performing an action.